The West Africa gold miner now holds nearly 10% of Oklo, up from a fraction under 8% previously.
Resolute's flagship Syama operation is in Mali.
As the firefinch flies, Oklo's emerging Dandoko/Seko prospect is about 300km northwest of Syama - with the firefinch Mali's national mascot.
In contrast, B2Gold's Fekola operation and IAMGOLD's advanced Boto pre-development asset are right on Dandoko/Seko's doorstep, albeit Boto is across the border in Senegal.
Oklo raised $10 million for its exploration late last month by issuing new shares priced at 32c each, with Resolute participating in the fundraising.
It's understood BlackRock is Oklo's major shareholder, with a stake in the ‘teens'.
Shares in Oklo were up 3.5% to 30.5c, capitalising the explorer at $126 million.
